JPH0718754Y2 - Reinforcement device for metal filtration room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a reinforcing device for a metal filtration chamber.

(Prior Art) Conventionally, a filtration chamber for filtering a molten metal such as aluminum surrounded by front and rear walls and left and right walls is well known without being illustrated.

(Problems to be Solved by the Invention) The space (width) between the front wall and the rear wall of the known filtration chamber expands due to heat when the inside is filled with molten metal, and conversely at the end of work. It has the property of cooling and narrowing. If the degree of expansion and contraction is large, a gap is formed between the walls in the multilayer structure, and the molten metal penetrates into it, which causes a problem. Therefore, a material with a small expansion and contraction is required.

According to the present invention, a reinforcing rod is provided between the front and rear walls of the filtration chamber to prevent expansion. But,
If a reinforcing rod is simply provided, it will be loosened when it is contracted if it is designed on the basis of expansion, and it will be damaged when it is strongly expanded if it is set on the basis of cooling.

(Means for Solving the Problems) Therefore, the present invention is directed to a filtration chamber 6 for filtering a molten metal such as aluminum surrounded by front and rear walls 9 and 10 and left and right walls 11 and 12.
In the metal filtration chamber in which a front and rear reinforcing rod 21 is provided at an intermediate position between the front and rear walls 9 and 10, the reinforcing rod 21
Is a reinforcing device for a metal filtration chamber which is fixed by a spring body 22 so as to absorb the expansion and contraction of the front and rear walls 9 and 10 of the filtration chamber 6 caused by heat. It is a thing.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. 1 is a filtration tank for filtering molten metal such as aluminum, and 2 is a filtration unit housed in the filtration tank 1. In the filtration unit 2, between the front side plate 3 and the rear side plate 4 formed of a silicon carbide refractory plate, a ceramic tube 5 formed of an alumina porous tube is laid over several stages vertically and several left and right. The shape.

The filtration tank 1 for accommodating the filtration unit 2 is formed in various sizes, but the one shown in the figure is a large one having a filtration chamber 6 capable of accommodating four sets of the filtration units 2 in parallel on the left and right sides. is there. Therefore, although the front and rear sides of the filtration chamber 6 are formed to be larger than the widths of the front side plate 3 and the rear side plate 4 of the filtration unit 2, the left and right sides are formed longer and the bird's-eye view shape is a rectangle that is long in the left and right directions.

7 is a hot water supply port leading to the filtration chamber 6, 8 is a hot water outlet from the filtration chamber 6, 9 is a front wall of the filtration chamber 6, 10 is a rear wall of the filtration chamber 6, 11 is a left wall of the filtration chamber 6, and 12 is filtration. It is the right wall of chamber 6.

Usually, the front wall 9, the rear wall 10, the left wall 11, and the right wall 12 have an inner wall made of a brick inner wall 14, an outer wall made of a ceramic fireproof outer wall 15, and a castable layer 16 formed between the brick inner wall 14 and the fireproof outer wall 15. It has a three-layer structure, and all or part of the outside of the front wall 9, the left wall 11, and the right wall 12 is surrounded by a thin iron plate 13.

A reduction prevention wall 17 having a brick inner wall 14 on the left and right sides and a castable layer 16 on the middle side is provided at an intermediate position on the left and right of the filtration chamber 6 which is long on the left and right sides.

The front end of the reduction prevention wall 17 is joined to the front wall 9 and the rear end thereof is the rear wall 10.
To be joined to.

The reduction prevention wall 17 is provided with a plurality of upper and lower communication holes 18. Therefore, the filtration chamber 6 is divided into a left chamber and a right chamber, and two sets of filtration units 2 in each of the left and right chambers are housed in the example diagram.

Further, an engaging portion 19 projecting upward is provided at the left and right intermediate position of the thin iron plate 13 on the outer side. Since the engaging portion 19 inserts and supports the reinforcing rod 20 therethrough, if the structure in which the thin iron plate 13 is extended as it is is left uneasy in strength, separate members such as channel steel and angle steel are used. It is better to use. The reinforcing rod 20 is located higher than the filtration chamber 6.

Both ends of the reinforcing rod 20 protrude outward from the engaging portion 19, and the protrusion 21 has a spring 22 (a coil spring or a disc spring may be used, but a considerably strong elastic force is required, Is more suitable) and the washer 23 is fitted, and the nut 24 is elastically tightened from the outside. The spring 22 may be one of the front and the rear.

That is, the front wall 9 and the rear wall 10 bulge outward due to thermal expansion and dent inward due to contraction, but even if such expansion and contraction occur, they can always be elastically reinforced with a constant force. .

Reference numeral 25 denotes a lid of the filtration tank 1, and a fitting groove 27 for the reinforcing rod 20 is formed in a central portion of a lower surface 26 of the lid 25. 28 is a heater.

(Operation) Next, the operation will be described.

When a molten metal such as aluminum is supplied from the hot water supply port 7, the molten metal passes through a plurality of upper and lower communication holes 18 to fill the left and right filtration chambers 6, is filtered by the ceramic tube 5, and is discharged from the hot water discharge port 8
It is further purified and taken out.

Since the molten metal is a molten metal having a temperature of 400 to 900 ° C or higher, the brick inner wall 14, the castable layer 16 and the fireproof outer wall 15 of the front wall 9, the rear wall 10, the left wall 11 and the right wall 12 are heated. Is expanded and inflates outward. When the filtration operation is completed, the size is reduced by cooling.

At this time, a gap is formed between the brick inner wall 14 and the castable layer 16, between the castable layer 16 and the fireproof outer wall 15, and between the fireproof outer wall 15 and the thin iron plate 13, and the molten metal supplied next enters this gap. The expansion should be as small as possible, as solidification will damage the walls.

In the present invention, the thin iron plate 13 is provided with an engaging portion 19 projecting upward at an intermediate position between the left and right, and the reinforcing rod 20 is inserted into and supported by the engaging portion 19 via the spring body 22. , Even if it bulges outward due to thermal expansion and dents inside due to contraction, it can always be elastically reinforced with a constant force.

(Effect) Between the front wall and the rear wall of the known filtration chamber, when the inside thereof is filled with molten metal, it expands due to heat and bulges outward, and at the end of the work, it cools inwardly. Contract.
If this degree of expansion / contraction is large, a gap is created in the wall of the multilayer structure, which causes damage.

However, according to the present invention, the front and rear walls 9 and 10 and the left and right walls 11 and 12 are
In the metal filtration chamber, which is provided with a reinforcement rod 21 in the front-rear direction at an intermediate position between the front and rear walls 9 and 10 of the filtration chamber 6 for filtering the molten metal such as aluminum enclosed by
Reference numeral 21 denotes a metal filtration chamber reinforcing device which is clamped and fixed via a spring body 22 so that the front and rear walls 9 and 10 of the filtration chamber 6 can absorb the expansion and contraction due to heat even if they are expanded and contracted. I did. The front and rear walls 9 and the rear wall 10 of the filtration chamber 6 are provided with the reinforcing rods 21 in the front-rear direction at the left and right intermediate portions thereof.
Decrease thermal expansion reduction of 10.

B. Since the reinforcing rod 21 is attached through the spring body 22, the front wall 9 and the rear wall 10 of the filtration chamber 6 are elastically expanded with a constant force even when the front wall 9 and the rear wall 10 bulge outward due to thermal expansion and dent inward due to contraction. To reinforce.

There is an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional front view, FIG. 2 is a cross sectional plan view, FIG. 3 is a vertical sectional side view of a filtration unit, and FIG. 4 is a vertical sectional side view. Explanation of symbols 1 ... Filtration tank, 2 ... Filtration unit, 3 ... Front plate, 4
…… Rear side plate, 5 …… Ceramic tube, 6 …… Filtration chamber, 7 …… Hot water inlet, 8 …… Hot water outlet, 9 …… Front wall, 10 ……
Rear wall 10, 11 …… Left wall, 12 …… Right wall, 13 …… Thin iron plate, 14…
… Brick inner wall, 15 …… fireproof outer wall, 16 …… castable layer,
17 ... Shrinkage prevention wall, 18 ... Communication hole, 19 ... Engagement part, 20 ...
… Reinforcing rod, 21 …… Projection, 22 …… Spring, 23 …… Washer, 24 …… Nut, 25 …… Lid, 26 …… Bottom surface, 27 …… Fitting groove, 28 …… Heater.

Claims (1)

[Scope of utility model registration request] 1. A reinforcing rod 21 in the front-rear direction at a left-right intermediate position between the front and rear walls 9, 10 of a filtration chamber 6 for filtering molten metal such as aluminum surrounded by the front and rear walls 9, 10 and the left and right walls 11, 12.
In the metal filtration chamber provided with, the reinforcing rod 21 is tightened via the spring body 22 so as to absorb the expansion and contraction of the front and rear walls 9 and 10 of the filtration chamber 6 due to heat. Reinforcement device for fixed metal filtration chamber.